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If you have a way to intentionally ping your own creatures, Silverclad Ferocidons can clear out a lot of the board for you
Fabrication Foundry The Fabrication Foundry does nicely with a mana value of two, but you must be focused on artifacts for this to be a second Arcane Signet
There's no expedited shipping option listed, but the production speed alone puts Snapshot ahead of services with 7-10 day production windows
You get your threats on board early, then use Enduring Innocence and Hawk to pull ahead in terms of card advantage
